Vortex Crossfire II 4-12x40mm AO Rifle Scope is a small-frame, high accuracy Rifle Scope based off the design of the original CrossFire. Built out of a single piece of aircraft grade aluminum and fashioned into a 1" tube, these Rifle Scopes from Vortex Optics are waterproof, fog-proof, and shockproof, creating a highly durable scope that you'll want to use over and over again. Fully multi-coated optics on the Rifle Scope give you a high enough light transmission rate for accurate shooting at dawn and dusk, and the smaller objective lens diameter results in a lighter body and a more compact profile. The Vortex Optics Crossfire II 4-12x Adjustable Objective Rifle Scope has the fast focus eyepiece and will eliminate parallax error. Capped turrets improve the mobility of the scope. If you liked the original Vortex Crossfire Rifle Scope, you'll really love the improved Vortex Crossfire II 4-12x40mm Capped Turret Scope.